<![CDATA[This study is a quasi-experimentresearch which aims at investigating the effectiveness of cooperative learning of NHT type in Mathematics subject of matrix lesson which focuses on four aspects (1) students’ activities, (2) teacher’s skill in managing the lesson, (3) students’ response, and (4) students’ learning result, and the significant difference between pretest and posttest scores. This research was conducted at SMA Negeri 2 Watampone. The population was the third-gradestudents of Science classintheoddsemester of academic year 2008/2009. The sample was taken through random sampling technique with one group pretest-posttest research design. The study results showed that (1) the students’ activities during the teaching-learning process were effective, (2) the teachers’ skill in managing the lesson was classified in good category, (3) the students’ response toward the lesson were positive, and (4) the students’ learning results have achieved the learning completeness. Inferential statistics analysis showed that there issignificantdifference between the pretest and posttest in cooperative learning of NHT type for the matrix material. Based on the study result it was concluded that the cooperative learning of NHT type is effective to be applied inmathematics subject of matrixmaterial to the third-gradestudents of science class at SMA Negeri 2 Watampone.]]>
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